CO
🇺🇸
Clarence Oosterbaan
USA
Class of 2026 · Born St. Louis, NC · Jan 31 ·
★★2-Star
STR
40.1
current (projection)
StrikePrediction · favourite to commit:
Carleton
26%
4 offers
Rankings
| Recruiting board (consensus) | #501 |
| North Carolina | #7 |
| Ranking points (178 pts · 21 events) | #677 |
| STR | 40.1 |
| Junior STR (singles) | 39.4 |
| Doubles STR (results-based) | 39.0 |
Junior Badges
STATETop 10
STATETop 25
Junior Results
DATETOURNAMENT
LEVELRESULT
Wk 2
Campinas Invitational
State
R16
Wk 4
Rotterdam Classic
State
R32
Wk 6
Mumbai Invitational
State
Quarterfinalist
Wk 7
Chengdu Open
State
R16
Wk 9
Houston Classic
State
Quarterfinalist
Wk 11
Munich Open
State
Quarterfinalist
Wk 12
Belo Horizonte Open
State
Semifinalist
Wk 14
Edmonton Classic
State
Quarterfinalist
Wk 16
Rijeka Invitational
State
Semifinalist
Wk 18
Valencia Invitational
State
Finalist
Wk 19
Zrenjanin Challenger
Developmental
Finalist
Wk 21
Kolkata Cup
Developmental
R32
Wk 23
Geelong Cup
Developmental
R32
Wk 24
Southampton Challenger
Developmental
R16
Wk 26
Ahmedabad Challenger
Developmental
Semifinalist
Wk 28
Dallas Cup
Developmental
R16
Wk 30
Rijeka Cup
Developmental
R16
Wk 31
Salta Challenger
Developmental
Quarterfinalist
Wk 33
Pančevo Open
Developmental
Semifinalist
Wk 35
Wuxi Cup
Developmental
R32
Wk 36
Málaga Cup
Developmental
Finalist
Junior Doubles
DATETOURNAMENT
LEVELPARTNERRESULT
Wk 2
Campinas Invitational
State
David Sarabia
Semifinalist
Wk 7
Chengdu Open
State
DeAgo Knight
Quarterfinalist
Wk 11
Munich Open
State
Gavin Forood
Semifinalist
Wk 12
Belo Horizonte Open
State
Eugene McGree
Champion
Wk 19
Zrenjanin Challenger
Developmental
Will Hull
Champion
Wk 26
Ahmedabad Challenger
Developmental
Kevin Alvarez
Finalist
Wk 28
Dallas Cup
Developmental
Mike Pustovyi
Semifinalist
Wk 36
Málaga Cup
Developmental
Wilbur Kuznetsov
Semifinalist
Junior Match Record
DATETOURNAMENT
W/LOPPONENTSCORE
Wk 2
Campinas Invitational Round of 32
W
Hayes Washburn
3-6 6-1 10-7
Wk 2
Campinas Invitational Round of 16
L
Miles Gregory
4-6 6-7
Wk 4
Rotterdam Classic Round of 32
L
Nicola Verratti
1-6 4-6
Wk 6
Mumbai Invitational Round of 16
W
Vahid Gambale
6-1 6-1
Wk 6
Mumbai Invitational Quarterfinals
L
Malcolm Nesbeth
6-4 3-6 8-10
Wk 7
Chengdu Open Round of 32
W
Jerome Toole
6-7 6-2 12-10
Wk 7
Chengdu Open Round of 16
L
Victor Sarkissian
5-7 5-7
Wk 9
Houston Classic Round of 32
W
Marmaduke Huggins
6-3 6-0
Wk 9
Houston Classic Round of 16
W
Ernesto Onyewu
6-3 6-3
Wk 9
Houston Classic Quarterfinals
L
Eugène Brubaker
6-7 4-6
Wk 11
Munich Open Round of 32
W
Norris Gonnerman
6-2 6-0
Wk 11
Munich Open Round of 16
W
Doug Shepherd
6-2 2-6 10-2
Wk 11
Munich Open Quarterfinals
L
Karen Pashkova
6-7 4-6
Wk 12
Belo Horizonte Open Round of 32
W
Julián Hoffmann
6-1 6-0
Wk 12
Belo Horizonte Open Round of 16
W
Joey Belinsky
6-3 6-3
Wk 12
Belo Horizonte Open Quarterfinals
W
Perth Bott
7-6 3-6 11-9
Wk 12
Belo Horizonte Open Semifinals
L
Ace Hensley
2-6 6-7
Wk 14
Edmonton Classic Round of 32
W
Denis Zhurbin
6-0 6-2
Wk 14
Edmonton Classic Round of 16
W
Clay Alves
7-5 6-2
Wk 14
Edmonton Classic Quarterfinals
L
Karen Pashkova
6-4 5-7 6-10
Wk 16
Rijeka Invitational Round of 32
W
Denis Zhurbin
6-0 6-1
Wk 16
Rijeka Invitational Round of 16
W
Charley Howard
6-4 6-1
Wk 16
Rijeka Invitational Quarterfinals
W
Tim Hargrove
4-6 6-3 11-9
Wk 16
Rijeka Invitational Semifinals
L
Victor Mickell
6-7 6-4 2-10
Wk 18
Valencia Invitational Round of 32
W
Rob Ionata
6-3 6-4
Wk 18
Valencia Invitational Round of 16
W
Alfred McCargo
7-5 6-0
Wk 18
Valencia Invitational Quarterfinals
W
Isadore Gates
6-1 6-3
Wk 18
Valencia Invitational Semifinals
W
Ace Hensley
4-6 6-3 10-7
Wk 18
Valencia Invitational Final
L
Zay Nesta
6-7 7-6 6-10
Wk 19
Zrenjanin Challenger Quarterfinals
W
Wilbur Kuznetsov
6-7 6-4 10-8
Wk 19
Zrenjanin Challenger Semifinals
W
José Torres
6-4 6-4
Wk 19
Zrenjanin Challenger Final
L
Kobie Burgić
4-6 6-7
Wk 21
Kolkata Cup Round of 32
L
Darrian Sitanilei
6-4 3-6 2-10
Wk 23
Geelong Cup Round of 32
L
Perth Bott
4-6 6-7
Wk 24
Southampton Challenger Round of 32
W
Dick Wild
6-3 7-5
Wk 24
Southampton Challenger Round of 16
L
Paul Negri
4-6 6-1 5-10
Wk 26
Ahmedabad Challenger Round of 32
W
Nathan Shank
6-3 6-0
Wk 26
Ahmedabad Challenger Round of 16
W
Stanislav Douděra
6-2 6-3
Wk 26
Ahmedabad Challenger Quarterfinals
W
Serdar Däbritz
7-6 6-3
Wk 26
Ahmedabad Challenger Semifinals
L
Eduardo Zamora
2-6 6-7
Wk 28
Dallas Cup Round of 32
W
Stanislav Douděra
6-4 7-6
Wk 28
Dallas Cup Round of 16
L
George Willingham
5-7 6-7
Wk 30
Rijeka Cup Round of 32
W
Julius Albert
2-6 6-4 13-11
Wk 30
Rijeka Cup Round of 16
L
Stanislav Douděra
4-6 5-7
Wk 31
Salta Challenger Round of 32
W
Amiel Loera
7-6 6-2
Wk 31
Salta Challenger Round of 16
W
Sherwood Connolly
6-4 4-6 10-8
Wk 31
Salta Challenger Quarterfinals
L
Alexander Lathan
4-6 2-6
Wk 33
Pančevo Open Round of 32
W
Filip Fiala
6-1 6-2
Wk 33
Pančevo Open Round of 16
W
Alexander Lathan
4-6 6-4 10-8
Wk 33
Pančevo Open Quarterfinals
W
Eoghan Caldwell
7-6 6-4
Wk 33
Pančevo Open Semifinals
L
Garth Barrera
6-3 3-6 8-10
Wk 35
Wuxi Cup Round of 32
L
Mickey Whitlinger
1-6 3-6
Wk 36
Málaga Cup Round of 32
W
Eugene McGree
6-3 3-6 10-7
Wk 36
Málaga Cup Round of 16
W
Stanislav Douděra
6-3 6-2
Wk 36
Málaga Cup Quarterfinals
W
Eoghan Caldwell
6-4 3-6 11-9
Wk 36
Málaga Cup Semifinals
W
Oldřich Kučera
7-5 6-2
Wk 36
Málaga Cup Final
L
Cameron Sherbeck
4-6 4-6
College List
SCHOOLOFFERINTEREST
SCHOL.STRIKEPRED.STATUS
Carleton
✓
Hot
¼
26%
Finalist
Nova Southeastern
✓
Hot
¼
25%
Finalist
Virginia State
✓
Hot
¼
25%
Finalist
North Greenville
✓
Hot
¼
25%
Top School
Dreamsheet
Stanford
Virginia
North Carolina
Scouting
| Shared service (consensus) | 55.3 |
| Your department | 52.7 |
| 4-year projection | 41.8 |
Ranking History
| DATE | NATIONAL | STATE | STR |
| Early 2026 | #509 | #11 | 38.9 |
| Mid 2026 | #502 | #10 | 39.0 |
| Late 2026 | #480 | #10 | 39.5 |
| Final 2026 | #486 | #10 | 39.3 |
Attributes
| Serve Power | 41 | |
| Serve Accuracy | 39 | |
| Return | 42 | |
| Forehand | 44 | |
| Backhand | 36 | |
| Consistency | 37 | |
| Net Play | 34 | |
| Speed | 42 | |
| Stamina | 41 | |
| Composure | 39 | |
| Clutch | 39 |
Recruiting
| Intended major | Digital Media |
| Junior tier | Local Competitive |
| Origin | Domestic |
| Commitment | Uncommitted |
Recruiting Timeline
| Received interest from Carleton | early_contact Wk 2 |
| Received interest from Nova Southeastern | early_contact Wk 2 |
| Received interest from Virginia State | early_contact Wk 4 |
| Offered by Carleton | offers Wk 8 |
| Offered by North Greenville | offers Wk 8 |
| Offered by Virginia State | offers Wk 9 |
| Offered by Nova Southeastern | offers Wk 12 |
| Official visit to Carleton | visits Wk 18 |
| Official visit to Nova Southeastern | visits Wk 18 |